POST 13: Rebuilding the orange bike's motor
Well, I was hoping that this would be a quick rebuild since the orange bike looked pretty good- and as it had been taken off the road because it had siezed, I'd assumed that it had been running at that time! Well best laid plans etc etc! The general picture here was that having replaced the cylinder and piston, the motor would run once I'd sorted out the carb float level by bending the tab to raise float height... BUT as described, the motor simply died whenever the throttle was opened. Further, the air screw had little effect on idle. Both of these observations suggested an air leak. Id found one around the reed valve but sadly this hadn't cured the problem. So I looked further. I found that squirting carb cleaner on to the case junction in front of the inlet manifold led to an increase in rpm. Also squirting it behind the flywheel led to a similar increase- looks like at least 2 leaks. I removed the flywheel and stator and found that a puff of air could be clea...